UILabel text animation as in UIButton click

Animating UILabel textcolor is not easy as it seems, normal animation won't work on this property. The below code snippet animates the UILabel textcolor as in button click.
Change the duration and UIViewAnimationOptions to play with it.

extension UILabel{
    func flashLabel() {
        func animate(duration:Double,alpha:CGFloat,completion:(()->())?){
            UIView.transition(with: self, duration: duration, options: UIViewAnimationOptions.transitionCrossDissolve, animations: {
                self.textColor = self.textColor?.withAlphaComponent(alpha)
            }) { _ in
                completion?()
            }
        }
        animate(duration: 0.1, alpha: 0) {
            animate(duration: 0.3, alpha: 1, completion: nil)
        }
    }
}

Happy coding...

Comments

UIAlertController made easy

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But, let's try with Swift. let alertVC = UIAlertController(title: "Alert", message: "Testing", preferredStyle: .alert) let okAction = UIAlertAction(title: "OK", style: .default, handler: nil) alertVC.addAction(okAction) Looking at the above, IOS needs a little extra code, doesn't it? But, that's not the end, let's make it lesser, reusable and better. How about this? alert(title: "Alert", message: "Auto dismiss in 4 sec") I've written an extension for UIViewController, which uses just the above…

Stack Problem - Balancing of Symbols

Stack Problem - Balancing of Symbols
Problem: Given an expression string exp , write a program to examine whether the pairs and the orders of “{“,”}”,”(“,”)”,”[“,”]” are correct in exp.

Example:
Input: exp = “[()]{}{[()()]()}”
Output: Balanced Input: exp = “[(])”
Output: Not Balanced
Algorithm:
Create a stack.while ( end of input is not reached ) {If the character read is not a symbol to be balanced, ignore it.If the character is an opening delimiter like ( , { or [ , PUSH it into the stack.If it is a closing symbol like ) , } , ] , then if the stack is empty report an error, otherwise POP the stack.If the symbol POP-ed is not the corresponding delimiter, report an error.At the end of the input, if the stack is not empty report an error.Implementation :
func balancingOfSymbols(string:String)->Bool{ guard string.count > 0else { return false } let symbols:[Character:Character] = ["{":"}","[":"]","(":")",] v…

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